The bathroom is the most technically demanding room in an Australian house. It is the only space where water is deliberately sprayed at the building fabric every day, where three trades have to sequence perfectly, and where a single failure of a $1,500 membrane can cause $60,000 of damage to the rooms around it. It is also, in Sydney, the renovation most likely to be done badly by someone charging a fair price for good work they did not actually perform.
Sydney bathroom renovations sit at the top of the national range. National figures put a bathroom renovation between roughly $10,200 and $20,400, with Sydney and Darwin the most expensive markets in the country — around 25 per cent above Hobart for identical scope. In practice, a properly executed Sydney family bathroom in 2026 costs between $22,000 and $38,000.
What You Get at Each Price Point
$15,000 to $22,000 — the compromise renovation
Achievable, but something is always giving. Typically this means a small bathroom under five square metres, budget tapware and vanity, standard 300×600 wall tiles laid to 2,100mm rather than full height, a framed shower screen, and the existing layout retained exactly. It works for investment properties and for owners who need a functional room now and a better one in fifteen years.
A related guide to consider while planning this work is How Much Does a Small Bathroom Renovation Cost?.
Be careful in this band. It is where corners get cut on the parts you cannot see — a single-coat membrane instead of the specified system, no screed falls to the waste, tiles laid on unprepared substrate. If a Sydney quote comes in under $18,000 for a full bathroom, ask specifically what waterproofing system is being used and who is issuing the certificate.
$22,000 to $32,000 — the standard Sydney bathroom
This is where most owner-occupier renovations land. Full-height tiling, a semi-frameless or frameless screen, a quality wall-hung or freestanding vanity, mid-range Australian tapware with a decent warranty, a heated towel rail, an inline exhaust fan ducted to outside, LED lighting, and a properly certified membrane. Minor layout adjustments within the existing footprint are included.
$32,000 to $50,000 — the reconfigured bathroom
Services move. The bath goes where the shower was. A hobless walk-in shower with a linear drain replaces a step-up shower base. Large-format tiles or full stone slabs go on the walls. Underfloor heating goes in. Custom joinery replaces an off-the-shelf vanity. Premium tapware in a specified finish is chosen at the design stage rather than picked from what is in stock.
$50,000 and above — the premium bathroom
Natural stone, book-matched feature walls, concealed cisterns and in-wall mixers, thermostatic shower systems, freestanding baths in solid surface material, bespoke mirror cabinetry with integrated lighting and demisting, and a builder allocating a dedicated tiler for three weeks rather than four days.
The Line-by-Line Breakdown
Here is where the money goes on a typical $28,000 Sydney bathroom of about seven square metres.
- Strip-out, disposal and site protection — $1,500 to $3,000. A bathroom strip-out produces two to three tonnes of tile, mortar bed and rubble, and Sydney mixed waste disposal runs $180 to $320 per tonne.
- Plumbing rough-in and fit-off — $4,000 to $8,000. Higher if the waste stack position changes or the floor is a concrete slab.
- Electrical — $1,500 to $3,500. Covers new circuits, IP-rated downlights, exhaust, heated towel rail, shaver point and any underfloor heating connection.
- Carpentry and substrate preparation — $1,200 to $3,000. Villaboard or compressed sheet, nogging, and levelling of the floor.
- Waterproofing to AS 3740 — $1,200 to $2,500. Includes the certificate.
- Screed and falls — $600 to $1,500.
- Tiling, supply and lay — $6,000 to $14,000. Laying labour alone runs $75 to $140 per square metre depending on tile format.
- Fixtures and fittings — $4,000 to $12,000. Vanity, toilet suite, shower screen, tapware, bath, mirror, accessories.
- Plastering, painting and making good — $1,500 to $3,000.
- Project management and margin — typically 15 to 25 per cent, either stated or built into the rates.
Waterproofing: The Line You Never Cut
Waterproofing failure is the most common and most expensive defect in Australian residential construction. In NSW, wet area waterproofing must comply with AS 3740 and the National Construction Code, and the work must be performed by a licensed waterproofer who issues a certificate of compliance.
What a compliant Sydney bathroom membrane involves:
- The entire shower floor and walls to at least 1,800mm within the shower enclosure
- The full bathroom floor where the room is above ground level or over a habitable space
- Wall junctions and floor-wall junctions treated with bond breakers and reinforcing fabric
- All penetrations — waste, tap bodies, screen fixings — individually sealed
- Correct falls to the waste, set in the screed before the membrane, not corrected with tile adhesive afterwards
- Adequate curing time between coats, and a flood test before tiling where practical
The single most useful thing you can do as a homeowner is take photographs of the membrane at completion, before tiling starts, and keep the waterproofer’s certificate with your property documents. If a dispute arises in year four, those photographs are the difference between a warranty claim and a very expensive argument. Our detailed guide on waterproofing and wet area compliance in Sydney covers what certifiers actually check.
Why Sydney Bathrooms Cost More
Trade rates and scarcity
Sydney plumbers bill around $92 an hour against $72 in the cheapest Australian markets. Good waterproofers and tilers in Sydney are booked months ahead, and scarcity is priced in. A bathroom needs roughly 120 to 200 trade hours; the Sydney premium on that alone is $3,000 to $5,000.
A related guide to consider while planning this work is How to Find and Vet a Renovation Builder in Sydney.
Older housing stock
A large share of Sydney’s bathrooms sit in homes built before 1970. That brings a predictable set of surprises:
- Asbestos sheeting behind tiles in wet areas of homes built between 1940 and 1990. Licensed removal starts around $2,500 for a small bathroom.
- Galvanised steel supply pipe that is corroded internally and must be replaced back to a serviceable connection point. $2,000 to $6,000.
- Rotten floor framing under a bathroom that has been leaking slowly for a decade. $3,000 to $12,000.
- Lead-based paint in pre-1970 homes, requiring controlled removal.
- Mortar-bed floors 60 to 100mm thick, which are heavy, slow to remove and expensive to dispose of.
Set a 20 per cent contingency for any bathroom in a pre-1980 Sydney home. It is not pessimism; it is arithmetic.
Access
Second-floor bathrooms in terraces with narrow stairs, apartments above level three with a single lift, homes on steep northern beaches blocks — every one of these adds labour hours to material handling. Inner-city access constraints routinely add 8 to 15 per cent.
Design Decisions Worth Making Early
Hobless showers
A hobless or step-free shower with a linear drain is the most requested upgrade in Sydney bathrooms and the one with the biggest structural implication. It requires the floor to be recessed within the shower zone, which in a timber-framed floor means altering joists, and in a slab means either a set-down that may not exist or a raised floor across the whole room. Expect $2,500 to $6,000 above a standard shower base. It is worth it if you plan to stay in the home long-term.
Tile format
Large-format tiles look better and have fewer grout lines to clean, but they demand a flatter substrate and cost more to lay. Laying rates rise sharply above 600×600. Very large formats above 1200mm require two tilers and specialist tools. If your walls are typical Sydney terrace walls — bowed, out of plumb, and 110 years old — large format will require levelling work that a 300×600 tile would have forgiven.
Ventilation
Sydney’s humidity makes ventilation non-negotiable. A ceiling exhaust that vents into the roof space rather than to outside is one of the most common defects in the city and a direct cause of mould in the roof cavity. Specify an inline fan with rigid or semi-rigid ducting discharged through the eave or roof, sized for the room volume, with a run-on timer. The upgrade over a builder’s-standard fan costs $300 to $700 and pays for itself in avoided mould remediation.
Layout within the footprint
The cheapest good bathroom is one where the toilet stays over its existing waste, the shower stays in its corner, and the vanity moves. Every fixture that moves adds plumbing hours. In a bathroom under six square metres, the difference between a rearranged layout and a retained one can be $5,000 — which buys a great deal of tapware.
Realistic Timelines
A Sydney bathroom takes two to four weeks of on-site work, but the calendar timeline is longer. The critical path looks like this:
- Days 1 to 3 — strip-out, disposal, structural inspection of what has been revealed
- Days 4 to 7 — plumbing and electrical rough-in, carpentry, substrate
- Days 8 to 11 — screed and falls, waterproofing with curing time between coats
- Days 12 to 18 — tiling walls and floor, then grouting after adhesive cure
- Days 19 to 23 — fit-off of tapware, toilet, vanity, screen, electrical
- Days 24 to 28 — painting, silicone, cleaning and defects
Add lead times for anything custom. A frameless screen is measured after tiling and takes two to three weeks to fabricate. Imported tapware in a specified finish can take six weeks. Stone vanity tops need templating. Order long-lead items before demolition, not during.
If you have only one bathroom, plan for the disruption honestly. Living in-situ adds 30 to 50 per cent to a project’s perceived timeline, and a household of four sharing a portable arrangement for a month is a genuine strain. Many Sydney homeowners find it cheaper overall to compress the works and stay elsewhere for two weeks than to stretch the job around occupancy.
Approvals and Compliance in Sydney
A like-for-like bathroom renovation in NSW that does not alter structure, does not change the building’s external appearance and does not affect fire separation is generally exempt development requiring no council approval. However:
- All plumbing work must be performed by a licensed plumber and, where drainage is altered, a Sydney Water notification may be required
- Waterproofing must be certified
- Electrical work requires a Certificate of Compliance for Electrical Work
- Work valued above $5,000 requires a written contract under NSW home building law, and above $20,000 it must be a major works contract with home warranty insurance
- Once total works exceed $50,000 in estimated value, BASIX obligations may be triggered
- Apartments require strata approval under the by-laws, usually as a minor or major renovation resolution
Getting the Quotes Right
Ask every Sydney bathroom quote to state, explicitly:
- The waterproofing system by brand and number of coats, and who issues the certificate
- The tile allowance per square metre, and whether that is supply-only or supplied and laid
- Whether tiling is full height or part height, and whether the ceiling is tiled
- The specific tapware and fixture models, not a lump-sum PC allowance you will inevitably exceed
- Whether the shower screen is framed, semi-frameless or frameless
- The exhaust fan model and where it discharges
- Who removes and disposes of waste, and whether skip permits are included
- The contingency treatment if rot, asbestos or corroded pipe is discovered
That last point separates professional Sydney builders from the rest. A good quote tells you in advance what happens when the floor comes up and something is wrong underneath. A bad one leaves it to be discovered on day three, when your negotiating position has evaporated along with your only bathroom.
For guidance on choosing who does the work, see our guide to finding and vetting a renovation builder in Sydney, and for how this fits into a broader budget, our Sydney renovation cost guide.
Small Bathrooms and Ensuites
A large share of Sydney’s housing stock has bathrooms under six square metres, and terraces and apartments frequently have less. Small does not mean cheap: the fixed costs — plumbing mobilisation, waterproofing, electrical, disposal — barely change, so a four square metre bathroom often costs 75 per cent of what a seven square metre one costs.
What works in a small Sydney bathroom:
- A wall-hung vanity with visible floor beneath it, which makes the room read as larger and simplifies cleaning
- A single large-format tile on floor and walls, reducing visual clutter from grout lines
- A frameless or single-panel screen rather than a framed enclosure, which visually divides a small room
- A wall-faced or concealed-cistern toilet, saving 100 to 150mm of floor depth
- A recessed shower niche instead of caddies, which requires framing before lining and cannot be added later
- A shower over bath where a bath is essential — though in most Sydney family homes, a well-designed larger shower is used more
Adding an ensuite to an existing home costs $18,000 to $35,000 where it can be built adjacent to existing services, and $30,000 to $55,000 where new drainage must be run. In a Sydney family suburb, a second bathroom is one of the highest-returning renovations available, frequently returning two to four times its cost.
Fixtures That Justify Their Price
Bathroom budgets are frequently spent in the wrong places. Where the money genuinely matters:
- Tapware cartridges. Cheap mixers fail at the cartridge, and replacing a wall-mounted mixer means opening a tiled wall. Buy tapware with a genuine Australian warranty and available spare parts.
- The shower screen. A 10mm toughened frameless panel with quality hardware is the difference between a screen that works for twenty years and one whose hinges corrode in five. In coastal Sydney, specify the hardware finish carefully.
- The exhaust fan. A $600 inline fan properly ducted outperforms a $90 ceiling unit by a wide margin and prevents the mould that Sydney’s humidity otherwise guarantees.
- The vanity carcass. Moisture-resistant board and quality runners. Standard particle board under a basin will swell within a decade.
- The waste and trap. Accessible, serviceable, and correctly sized. A tiled-in trap that cannot be reached is a future demolition job.
Where restraint is sensible: designer tiles above roughly $90 per square metre rarely read as better than a well-laid $50 tile; heated flooring is a comfort item rather than a value item in Sydney’s climate; and premium toilet suites deliver diminishing returns above the mid-range.